Hi - I'm brand new to the CSR board, and I'm very impressed with the knowledge shared and desire to help others on the board! I've been a boater my whole life and have been a co-owner on 2 boats with my brother (28ft Cruisers gas & 40ft Carver gas). My family and I are at a point where we are ready to purchase our own and have pinned it down to the 39/40 DA. I had a deposit recently on an 03 38DA but decided to go with the newer generation. We are looking hard at the 2005 39DA & 2006 40DA (basically the same boat), but are seriously on the fence regarding the Cummins QSBs vs Merc 8.1s...... I know, I know, this has been well traveled territory probably as most folks immediately say go diesel, but we are down to the fine details and really could use the expert experience of Sea Ray owners who either have had or currently have these two boats. Our boating will consist of Northport Harbor as the home port - cruising and anchoring the harbors along the Long Island Sound out to Montauk and probably 3 times a season heading out to Block Island / Newport or maybe MV at the farthest. Would we ever take it around the island and down to the Jersey Shore..... maybe, but that would be a long shot as we've never done that length trip in 25 years of boating. There appears to be about a $20-40k difference in the sale comps b/t these boats on the gas v. diesel and our budget really holds tight at nothing newer than a 2006 40DA gas 8.1 or the 2005 39DA diesel. Any sage advice from the members on helping us tip the scales b/t the two would be greatly appreciated!!!